CN105315539A - City square fire-retardant communication electric cable - Google Patents
City square fire-retardant communication electric cable Download PDFInfo
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- CN105315539A CN105315539A CN201410232243.8A CN201410232243A CN105315539A CN 105315539 A CN105315539 A CN 105315539A CN 201410232243 A CN201410232243 A CN 201410232243A CN 105315539 A CN105315539 A CN 105315539A
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Abstract
The present invention discloses a city square fire-retardant communication electric cable, which comprises a cable core, wherein the cable core comprises a copper conductor and a semiconductor nylon belt cladded on the copper conductor surface, a cross-linked polyethylene shield layer and a flame-retardant polyvinyl chloride outer sheath are sequentially cladded from inside to outside outside the cable core, and the raw materials of the flame-retardant polyvinyl chloride outer sheath comprise, by weight, 15-35 parts of polyethylene, 20-40 parts of an ethylene-vinyl acetate copolymer, 40-52 parts of a flame retardant agent, 15-23 parts of a synergetic flame retardant agent, 6-10 parts of a compatibilizer EVA-g-MA, 1-1.3 parts of a thermal stabilizer, 2-5 parts of carbon black, 0.6-0.9 part of pentaerythritol tetrakis(beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), and 0.2-0.5 part of tris[2,4-di-tert-butylphenyl]phosphite. The city square fire-retardant communication electric cable of the present invention does not contain harmful metals and halogenated hydrocarbons, and has characteristics of excellent flame retardant effect, good processability, and good heat resistance.
Description
Technical field
The present invention relates to technical field of communication cables, particularly relate to the fire-retardant communication cable of a kind of city square.
Background technology
Along with the develop rapidly of China's communications industry, as artery and the blood vessel of signal conveying, the demand of communication cable also grows with each passing day.In the communication cable of various insulating forms, crosslinked polyetylene insulated communication cable be one show up prominently, flourish new army.And along with the reinforcement of people to environmental consciousness and the appearance of environmental regulation, there is Halogen, the macromolecular material Non-halogen Flame Retardant Technology of low cigarette characteristic will progressively replace halogen flame-retarded technology.For a long time, in electric wire and cable material, the consumption of polyvinyl chloride (PVC) account for 80% nearly.Due in PVC cable material containing the harmful heavy metal such as lead, tin, barium, and PVC can produce in combustion and has the gas such as toxicity and corrosive hydrogenchloride and violent dense smoke, easily causes a large amount of loss of life and personal injury and the damage of precision instrument in a fire.Therefore, the developed countries such as Europe and Japan have formulated the new standard of cable in succession, and the particularly use of the halide-containings such as strict restriction PVC in RoHS instruction, people transfer to study crosslinked polyetylene insulated communication cable, improve its flame retardant properties.
Summary of the invention
The technical problem that basic background technology exists, the present invention proposes the fire-retardant communication cable of a kind of city square, not containing harmful heavy metal, not containing halohydrocarbon, has excellent flame retardant effect, also possesses good processing characteristics and resistance toheat.
The fire-retardant communication cable of a kind of city square that the present invention proposes, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 15-35 part, second is rare-vinyl acetate copolymer 20-40 part, fire retardant 40-52 part, synergistic flame retardant 15-23 part, expanding material EVA-g-MA6-10 part, thermo-stabilizer 1-1.3 part, carbon black 2-5 part, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.6-0.9 parts and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester 0.2-0.5 part; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 145-156 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
In specific embodiment, poly weight part can be 15 parts, 20 parts, 24 parts, 30 parts, 32 parts, 35 parts, second is rare-and the weight part of vinyl acetate copolymer can be 20 parts, 22 parts, 23 parts, 24 parts, 26 parts, 27 parts, 28 parts, 32 parts, 35 parts, 37 parts, 38 parts, 39 parts, 40 parts, the weight part of fire retardant can be 40 parts, 45 parts, 50 parts, 52 parts, the weight part of synergistic flame retardant can be 15 parts, 17 parts, 20 parts, 22 parts, 23 parts, the weight part of expanding material EVA-g-MA can be 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, the weight part of thermo-stabilizer can be 1 part, 1.1 part, 1.2 part, 1.3 part, the weight part of carbon black can be 2 parts, 3 parts, 4 parts, 5 parts, four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] weight part of pentaerythritol ester can be 0.6 part, 0.7 part, 0.8 part, 0.9 part and three [2, 4-di-tert-butyl-phenyl] weight part of phosphorous acid ester can be 0.2 part, 0.3 part, 0.4 part, 0.5 part.
Preferably, second rare-vinyl acetate copolymer in vinyl acetate content be 15-24%.
Preferably, the percentage of grafting of described expanding material EVA-g-MA is 0.85-1.2%.
Preferably, the weight ratio of polyethylene, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester is 24-32:0.6-0.8:0.2-0.4.
Preferably, melting temperature is 150-152 DEG C.
The present invention take polyethylene as major ingredient, make sheath nonpolarity, there is dielectric loss low, the electrical property that dielectric strength is large, add second rare-vinyl acetate copolymer and expanding material EVA-g-MA with the use of, sheath of the present invention is made to have good filler pardon and cross linkable, also improve tensile strength and the elongation of sheath, increase the addition of inorganics, in auxiliary material four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2, 4-di-tert-butyl-phenyl] phosphorous acid ester is as oxidation inhibitor conbined usage, make antioxidant property of the present invention excellent, increase the service life, and utilize the synergy of fire retardant and synergistic flame retardant, significantly improve flame retardant effect of the present invention, greatly reduce the possibility of causing danger.The present invention, not containing harmful heavy metal, not containing halohydrocarbon, has excellent flame retardant effect, also possesses good processing characteristics and resistance toheat, even if burning also can produce a large amount of toxic gas and violent dense smoke, make the present invention be more suitable for using at city square.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
The fire-retardant communication cable of a kind of city square that the present invention proposes, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 15 parts, second is rare-vinyl acetate copolymer 40 parts, fire retardant 40 parts, synergistic flame retardant 23 parts, expanding material EVA-g-MA6 part, thermo-stabilizer 1.3 parts, carbon black 2 parts, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.9 part and three [2,4-di-tert-butyl-phenyl] phosphorous acid esters 0.2 part; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 156 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
Embodiment 2
The fire-retardant communication cable of a kind of city square that the present invention proposes, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 35 parts, second is rare-vinyl acetate copolymer 20 parts, fire retardant 52 parts, synergistic flame retardant 15 parts, expanding material EVA-g-MA10 part, thermo-stabilizer 1 part, carbon black 5 parts, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.6 part and three [2,4-di-tert-butyl-phenyl] phosphorous acid esters 0.5 part; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 145 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
Embodiment 3
The fire-retardant communication cable of a kind of city square that the present invention proposes, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 24 parts, second is rare-vinyl acetate copolymer 35 parts, fire retardant 45 parts, synergistic flame retardant 20 parts, expanding material EVA-g-MA7 part, thermo-stabilizer 1.2 parts, carbon black 3 parts, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.6 part and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester 0.4 part, wherein second rare-vinyl acetate copolymer in vinyl acetate content be 15%, the percentage of grafting of described expanding material EVA-g-MA is 1.2%; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 150 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
Embodiment 4
The fire-retardant communication cable of a kind of city square that the present invention proposes, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 32 parts, second is rare-vinyl acetate copolymer 27 parts, fire retardant 50 parts, synergistic flame retardant 17 parts, expanding material EVA-g-MA9 part, thermo-stabilizer 1.1 parts, carbon black 4 parts, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.8 part and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester 0.2 part, wherein second rare-vinyl acetate copolymer in vinyl acetate content be 24%, the percentage of grafting of described expanding material EVA-g-MA is 0.85%; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 152 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
Carry out performance test to embodiment 1-4, result is as follows:
| Test event | Embodiment 1-4 test result mean value |
| Limiting oxygen index(LOI) | ≥31％ |
| Breaking tenacity | ≥12MPa |
| Elongation at break | 180％ |
| Vicat softening point | ≥65℃ |
| Melt flow rate (MFR) (MFR) | 1.5g/10min |
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (5)
1. the fire-retardant communication cable of city square, it is characterized in that, comprise cable core, cable core is made up of copper conductor and the semi-conductor nylon tape being coated on copper conductor surface, is coated with crosslinked polyethylene screen layer, flame-proof polyvinyl chloride oversheath from inside to outside successively outward at cable core; Wherein the raw material of flame-proof polyvinyl chloride oversheath comprises by weight: polyethylene 15-35 part, second is rare-vinyl acetate copolymer 20-40 part, fire retardant 40-52 part, synergistic flame retardant 15-23 part, expanding material EVA-g-MA6-10 part, thermo-stabilizer 1-1.3 part, carbon black 2-5 part, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester 0.6-0.9 parts and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester 0.2-0.5 part; Following technique is adopted to prepare: first by rare to polyethylene, second-vinyl acetate copolymer, synergistic flame retardant, expanding material EVA-g-MA, thermo-stabilizer, carbon black, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester puts into twin screw extruder, fire retardant is added wherein from the side spout of twin screw extruder, 145-156 DEG C carry out mixing, extrude, cool, pelletizing obtains fire-retardant communication cable sheath.
2. the fire-retardant communication cable coating resin of city square according to claim 1, is characterized in that, second is rare-vinyl acetate copolymer in vinyl acetate content be 15-24%.
3. the fire-retardant communication cable coating resin of city square according to claim 1, is characterized in that, the percentage of grafting of described expanding material EVA-g-MA is 0.85-1.2%.
4. the fire-retardant communication cable coating resin of city square according to claim 1, it is characterized in that, polyethylene, four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] weight ratio of pentaerythritol ester and three [2,4-di-tert-butyl-phenyl] phosphorous acid ester is 24-32:0.6-0.8:0.2-0.4.
5. the fire-retardant communication cable coating resin of city square according to claim 1, is characterized in that, melting temperature is 150-152 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410232243.8A CN105315539A (en) | 2014-05-28 | 2014-05-28 | City square fire-retardant communication electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410232243.8A CN105315539A (en) | 2014-05-28 | 2014-05-28 | City square fire-retardant communication electric cable |
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| Publication Number | Publication Date |
|---|---|
| CN105315539A true CN105315539A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410232243.8A Pending CN105315539A (en) | 2014-05-28 | 2014-05-28 | City square fire-retardant communication electric cable |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875752A (en) * | 2009-04-28 | 2010-11-03 | 日立电线株式会社 | Non-halogen fire retardant resin composition, its preparation method and the electric wire and cable that uses it |
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- 2014-05-28 CN CN201410232243.8A patent/CN105315539A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875752A (en) * | 2009-04-28 | 2010-11-03 | 日立电线株式会社 | Non-halogen fire retardant resin composition, its preparation method and the electric wire and cable that uses it |
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